Hi, I have a fish tank, not sure on how much water it holds but it is about two foot wide and one foot tall. I currently have 3 mollies, 2 platys, 2 neon tetra, 1 black red tail shark, 1 plec, and a red clawed crab. I did have 6 guppys (not all at once) but they kept dying and I have no clue...